Metallic alloy.



ever, is the producing of a metallic alloy for these stated purposes is composed of point; the nickel is melted in another cruci- METALLIC ALLOY.

938,422. Specification vf'lettel'slatent- Patented Oct. 26, 1909. No Drawing. Application filed March 5, 1909. Serial No. 481,324. I

To all whom it may concern:

Be it known that I, G1z. HARTMANN, a citizen of Austria-Hungary, and a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Metallic Alloys, of which the ollowing is a full, clear, and exact specification.

My invention relates to metallic alloys,- particularly suchused as solder, its object being to provide a solder for joining together parts of aluminum, and also for joining together aluminum to other metals.

The main object of my invention, howdients of the composition must be melted 55 and treated in clay crucibles, and not in I other vessels as sometimes used for preparing metallic alloys. The molten composition is then cast into iron molds and is slowly cooled. The iron molds, into which the composition is cast, should be warmed to about 220 to 250 F. to prevent chillin of the cast,,and after the ingots are cooler, they may be cut into suitable lengths and shapes, and are ready for use as solder. The use of this solder does not require any flux. Its melting point is suflicient-ly low to permit itbeing applied by an ordinary to serve as solder for joining together pieces of metallic aluminum, both for the purpose of repairing broken structures, or joining together parts of such aluminum structu es.

.My invention consists particularly of the alloy composed as hereinafter set forth, and of the process of compounding the ingredients of the alloy together.

The metallic alloy which I have devised ever, that the soldering iron must be clean The pieces to be soldered together by this alloy must be first thoroughly cleaned, particularly on the surfaces to be joined together. This is best accomplished byheating the parts and brushing the surfaces of the fracture with a steel wire brush. Then, While the parts, to be soldered together, are

tin, aluminum, nickel and of metallic mag nesium, and the best result is obtained when these ingredients are compounded in the following proportions, determined by weight, and bearing in mind that the metals to be used shall be of the quality known in. t e arts as pure: of tin, eight hundred (800) mills, of aluminum, one hundred and seventy (170') mills, of .nickel, seven (7) mills and of metallic magnesium, twentythree (23) mills.

n preparing the alloy, the aluminum and the magnesium are first fused together in a crucible, care being taken that the mixture should not be heated above the melting and if they be large, it is preferable to use a blow-pipe for that purpose. The solder adheres readily and very strongly and hardens rapidly. Then the edges of the parts thus joined together by the molten solder, are made even, smooth and clean with the soldering iron, and eventually With a file and the steel .Wire brush.

I have experimented extensively with this alloy, using as solder for structural parts of aluminum, and I have employed it quite exble, and when in this molten condition, is mixed with the fused aluminum and magnesium. During this mixing process, all these ingredients must be kept in freely flowing, molten state, and the molten composition mustbe agitated and thoroughly mixed. Finally, the tin is also melted, and while in such molten state, is added to the molten mixture of aluminum, magnesium and nickel; after the molten tin is added thereto, the composition must again be agitated and thoroughly mixed. The metallic ingrepractical Work. The results of these experiments and practical use of this solder satisfied me that it is highly suitable for such purposes. Fractures or parts of aluminum castings jointed by this solder, made as hereinbefore described, Will-stand any test that structural aluminum, used in various arts,

deteriorate, is always ready for use, and 1s magnesium. 4 t very easily applicable as compared wlth 3. The process of compounding the hereinother alloys which have been heretofore tried before described metallic alloy, consisting (l) is required to stand. The solder does not (23) mills of commercially purei metallic for such purposes. Its tensile strength and in fusing together the aluminum and magits capacity to withstand oxidation or de nesium; (2) melting the nickel in another terioration from any cause, is equal to that crucible and adding it to the compound of of aluminum; in fact, in testing such soldered aluminum and magnesium, while in a molten pieces, it almost invariably happened, that state, and then agitating and mixing the the solid metal gave way in some part an aluminum, magnesium and nickel together; the soldered joint could seldom be broken, (3) melting the tin in a sperate crucible and or torn in such testing. adding it tothe compound of aluminum, I claim as my invention: magnesium and nickel, while both are kept 1. A metallic alloy of tin, aluminum, in molten state; and then agitating and nickel and metallic magnesium, compounded mixing them together; (4) casting the molten substantially in the proportions stated. composition into heated iron molds, and 2. A metallic alloy composed of eight hunslowly cooling it. I

dred (800) mills of commercially pure tin, GEZA HARTMANN'. one hundred and seventy (170) mills of com- Witnesses:

merciall-y pure allnninum, seven (7) mills of M. A. HELMKE,

commercially pure nickel and twenty-three V. M. BRAUN. 

